Study of electrochemical removal of phenanthrene in bentonite clay by physicochemical indicators

Méndez, Erika; García, J.A.; Aguirre, Gerardo; Solís, S.; Prieto, Francisco; Pamukcu, Sibel; Bustos, Erika

doi:10.1016/j.seppur.2018.04.078

Cited by 11 publications

(2 citation statements)

References 20 publications

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“…Specifically, this technique is called electrokinetic remediation (EKR) when it is applied to contaminated soils with the aim of mobilizing polluting species to controlled extraction points [1][2][3][4]. The coupling of the above-mentioned transport mechanisms and the fact that, these treatments can be successfully applied in soils with low hydraulic permeability, where Darcy flow is very limited, makes EKR technology a very versatile technique and consequently, an efficient and competitive alternative for treating pollution events with different compounds such as heavy metals [5][6][7][8], PAH [9][10][11][12][13] or pesticides [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Calcite buffer effects in electrokinetic remediation of clopyralid-polluted soils

López-Vizcaíno

Santos

Yustres

et al. 2019

Separation and Purification Technology

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This work presents a study of the dissolution-precipitation processes of calcite in soil undergoing electrokinetic remediation processes. For this purpose, a numerical inspection of one of these processes in a calcareous soil (10% calcite content) contaminated with an of the organochlorine acid herbicide (3,6-dichloro-2-pyridinecarboxylic acid) was carried out. The numerical tool used to perform this analysis was the Multiphysics for EKR (M4EKR), a module programmed by the authors in the COMSOL Multiphysics platform. A detailed analysis of the pH, the distribution of species that have a significant influence on soil buffering capacity (carbonates and calcite), as well as the pollutant, has been performed. In this way, the kinetics of the calcite dissolution-precipitation processes have been analysed in order to determine the pH of the water in the pores and, therefore, how it directly affects the effectiveness of the treatment. Additionally, a sensitivity analysis of the selected EKR process has been carried out at different values of the rate of calcite dissolution due to the uncertainty associated with the reactive surface area parameter.

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Section: Introductionmentioning

confidence: 99%

Calcite buffer effects in electrokinetic remediation of clopyralid-polluted soils

López-Vizcaíno

Santos

Yustres

et al. 2019

Separation and Purification Technology

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“…In recent years, the electrochemical method has been successfully applied to many fields of geotechnical engineering, such as the electrochemical consolidation of weak rock [10][11][12] , the electrochemical desalination of rock or soil [14][15][16][17][18][19][20] , the drainage and consolidation of soil by electro-osmosis [21][22][23][24][25][26][27] , and the acceleration of methane desorption in lump anthracite by the electrochemical treatment [28][29][30] . Meanwhile, the electrochemical treatment was used to accelerate the hydration reaction rate to enhance the strength and deformation characteristics of fly-ash-cemented filling materials 31 .…”

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confidence: 99%

Experimental and mechanistic research on modifying the mechanic properties of the high water backfill material by electrochemical treatment

Xie

Sun

Wang

et al. 2020

Sci Rep

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To promote the engineering applications of high water backfill materials (HWBM) in mining, a series of experiments are performed to investigate the effects of the direct current (DC) electric field on the mechanic properties and electrical resistivity of HWBMs. Based on X-ray diffraction (XRD) and scanning electron microscopy (SEM) investigations, the influence of electrochemical treatment on the hydration products and the microstructure of the HWBM was studied. The results show that the peak strength, elastic modulus, deformation modulus and electrical resistivity of the HWBM samples all first increased and then decreased with the increasing of the potential gradient, and the peak points appeared when the potential gradient was 0.2 V/cm. The anisotropy of content of ettringite and calcium silicate hydrates (C–S–H) increased betweent the anodic and cathodic regions of samples. Meanwhile, microstructure in the anodic region of the samples was more stable after electrochemical treatment, which indicates that the different variation of mineralogical compositions and microstructures in different regions of the samples are the primary factors affecting the mechanic properties and electrical resistivity of the HWBM. Therefore, the electrochemical method is a potential technology to modify the engineering properties of the HWBM.

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Electrochemical Technologies for Petroleum Contaminated Soils

Pamukcu

2021

Environmental Pollution

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Study of electrochemical removal of phenanthrene in bentonite clay by physicochemical indicators

Cited by 11 publications

References 20 publications

Calcite buffer effects in electrokinetic remediation of clopyralid-polluted soils

Calcite buffer effects in electrokinetic remediation of clopyralid-polluted soils

Experimental and mechanistic research on modifying the mechanic properties of the high water backfill material by electrochemical treatment

Electrochemical Technologies for Petroleum Contaminated Soils

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